Method of forming necks for hollow glassware.



L. W. PROBGER.

METHOD OF FORMING NEGKS FOR HOLLOW GLASSWARE.

APPLIOATION FILED JULY 12, 1911.

1,035,387. Pa ented Aug. 13,1912.

WITNESSES. INVENTOR.

50 Referring to "the drawing,

1 a suitable mold-table which is supported on LUIS W. PROEGER, F IITTSBURGH, PENNSYLVANIA.

METHOD OF FORMING NECKS FOR HOLLOW GLASSWARE.

Specification of Letters Patent.

Patented Aug. 13, 1912.

Application filed July 12, 1911. Serial No. 638,223.

To all whom it may concern:

Be it known that I, LUIS W. Pnononn, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny andState of Pennsylvania, have invented a new and useful Improvement in Methods of Forming Necks for Hollow Glassware; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to the method of forming articles of glassware; and its main object is to provide for the molding or formation of the neck or upper portion of a blank-for a bottle, fruit jar or other hollow article and the formation of the article from such blank without inverting the article and without the use of a plunger for molding the neck or mouth portion before the blowing operation to complete the article.

To these ends m invention consists, generally stated, in lifting a body of plastic lass by fluid pressure applied directly rom below and thereby shaping the upper end of the blank within a mold, and afterward expanding the same to form the finutilize air pressure applied below the mass of plastic glass to raise or lift the, mass into the neck forming portion of the mold, and the invention will be described in connection with this use of the method, thou h it is to be understood that any suitabe fluid pressure may be utilized for lifting the glass within the method for the formation of the neck or mouth portion of the blank and that the same'is included within my invention.

Before particularly describing the practiceof the method I will describe the apparatus as illustrated in the drawing suitable for carrying out the same.

1 designates the, bed-plate 2 by the standards .3. The bed-plate may be provided with suitable wheels for movi it from place to place.

On the bed-plate is'the stand 4 which supports the ta le 5. Carried by the'table 5 u have are the cups 6 which may be termed, in this particular instance, the mold-extension cups, in that they cooperate in connection with the blank-mold in the carrying out of my method. These cups 6 are slidable in the fixed guides 7. The cups 6 are provided with air-inlets 8 at their lower ends normally closed by the stems 9. The cups are also provided with the heads 10. The table 5 is illustrated asfadapted to revolve and may be moved by hand, or suitable mechanism may be provided for this purpose.

A head 12 is carried by the hollow piston- .rod 13 which works back and forth .in the cylinder 14, air being admitted to the cylinder by the pipe 13 to raise the piston. When one of the cups is brought around in position with the head 10 in alinement with the head 12 of the piston-rod, the pistonis likewise raised lank-mold 11 and rod is raised and the on to cooperate with the forms an extension of said blank-mold.

This blank-mold 11 is mounted on the table 1 and said blank-mold is an ordinary twopart mold adapted to open and close in the ordinary manner. At the upper end of the blank-mold is the neck-mold 15 which has a matrix or cavity of the form required for making the article desired, which in the present instance is a narrow-neck bottle. An

internal molding member or plun er'16.is operated by a piston within' the cy inder 17 and the air-pipe 18 is provided for admitting air to the blank. A cylinder 20 is provided for raising the cylinder 17 and the plun er 16 above the neck-mold 15 when the artic e has been finished and it is desired to open the blow-mold and neck-mold and remove it therefrom. A blow-mold 19 is employed to close around the blank which is formed in the mold 11 and in which the final blowing operation takes place to ex- 1 pand the blank.

By the utilization of fluid pressure as above described for lifting the body of glass into the mold and forcing it into the neck mold the glass is lifted bodily and suffientirely saved while much complication of mitted to elongate by its own weight and can be handled in the same way? as in theormachinery is done away with.

Incarrying out my improved method the .plastic glass is fed to the cup 6 in any desired Way, for example, with theabove ap- --paratus the plastic glass is allowed to pass from the furnace outlet into the cup 6 in position to receive it, and when the proper amount has been introduced into the cup to form the article desired the furnace outlet is closed in any suitable manner and the cup with the plastic glass is moved around into position where the head 10 will be in alinement with'the head 12 of the piston 13. By admit-ting air to the cylinder 14 the piston is raised, and with it the cup 6 which is brought up into engagement with the blank-mold 11 forming an extension of said mold. Air or other fluid pressure is admitted through the hollow piston-rod 13 such as through the central passage 13", an

this air passes up through the air-inlet 8 into the cup 6. This air pressure will lift the mass of plastic glass bodily within the blank-mold, and the glass will be forced up I: into the neck-mold so as to fill the matrix,

said air-pressure having suflicient force to thoroughly fill theheck-mold matrix around the plunger 16 forming the initial opening in the blank and give the proper form to the blank. The plunger 16 is then with- 'inold can then article;

drawn and sufficient air may be admitted to the glass-blank through the pipe 18 to form a preliminary cavity in the blank, and partially form the same within the blank-mold 11, 'as shown in dotted lines. The extension-cup 6 is then withdrawn, the blankmold opened and the blow-mold19- closed around the blank, when additional air is admitted by the pipe 18 to blow out the blank in the blow-mold to form the finished bottle. After this is done the cylinder 20'lifts the cylinder 17 and the plunger 16 to clear the neck-mold and, the'neck-mold and the blowbe opened to remove the By myimprovedmethod I- provide for the lifting-or raising of a mass of plastic glass up withina mold and forcing the glass of the article, by means of air or other fluid into a matrix to form the neck or one end pressure admitted to the mold and so am enabled to employ a blank mold which is in its upright normal position as distinguished.

from an inverted blank-mold sothat when the blank is formed and the blank-mold opened it is not necessary to invert the blank, but the blow-n oldls thrown around the blank and the blowing operation is completed without changing the blank. Furthermore, method I can employ a cup-extension'for the blank-mold into which the glass is de livered and which has a large opening-for lifted up in the blank-mold and the blank formed without either inverting the blanktical way of introducing the glass where narrow-neck bottles are tobe formed.

In Fig. 2 I have illustrated my method as appliedv to the making of a fruit-jar in which the cup 25 contains the plastic glass and said cup is introduced within the blowmold '26 from below, air is admitted as above to the bottom of the cup and the glass is raised or lifted so as to fill thenec'k matrix around the internal molding member 16, and when the blank has been formed in this manner the cup is withdrawn, a suitand the jar is finished in the manner above described.

What I claim is: I

1. The method of forming glass blanks in molds, consisting in liftin glass by fluid pressure a plie directly to the glass from below an thereby shaping Qthe upper-portion of the blank. 2. The method of forming hollow glass plastic glass by fluid pressure applied directly shaping the upper end of the blank, and then expanding the blank. 1 I

3. The method of forming hollow glass articles, consisting in forming a gather of under a mold, forcing the glass by fluid pressure applied directly to the glass from below into the neck forming portion of the mold and subsequently expanding the blank.

in the finished hollow mouth portion of the article, and formed.

consisting in lifting a'plastic glass body by ,flu1d-ressure appliedv directly to the'glass panding the blank so sure w thin a blank-mold and then. withposition of the by my improved 4 the plastic articles in molds, consisting in lifting the;

to the glass from below and thereby i this purpose, and when this cup extension isbrought around in proper position with ref-'' erence to the blank-mold the plastic glass is mold or attempting to introduce the molten glass into the narrow inlet of the neck-. mold, which is a very diflicult and impr'acable bottom 28 is applied to the blow-mold plastic glass within a cup, carrying the same I The method of forming hollow glass Y articles, consisting in lifting a body of plas-.. tic glass by fluid pressure applied'directly to the glass from below into the neck-folming portion of a mold and around a projectmouth forming mold member to form I then expanding the blank so 5. The method of forming glass, articles, 7

drawing the blank-mold and substituting cup with a blank-formin mold and liftin the finishing-mold and expanding the blank the plastic glass by flui pressure applied to finished form. directly to t e glass from below withm the 6. The method of forming hollow glass blank-forming mold to form the mouth of 5 articles, consisting in forming a gather of the article, expanding the glass within the 20 plastic glass within a cup, registering that blank-formin mold, substltuting a finishcup with a blank-forming mold, applying ing-mbld an expanding the glass therein fluid pressure applied directly to the glass to finish the article.

vfrom below to raise the glass within the In testimony whereof, I thesai d'LUIs W. 10 blank and mold and so forming the mouth PROEGER have hereunto set my hand.

of tliie article, and then expanding the LUIS W PRO-EGER blan f 7. The method of forming hollow glass Witnesses:

articles, consisting in forming a gather of -WM. A. STEINMEYER,

15 plastic glass within a cup, registering the JOHN F. WILL. 

